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excited state: state in which an atom or molecule picks up outside energy, causing an electron to move into a higher-energy orbital.
Definition of electron. : an elementary particle consisting of a charge of negative electricity equal to about 1.602 Ã 10â19 coulomb and having a mass when at rest of about 9.109 Ã 10â31 kilogram or about 1â1836 that of a proton.